Application Specific Messages Archive - IALA

Buoy position monitoring

Audrey Guinault — Fri, 17 May 2019 08:06:22 +0000

Parameter	Description
Introduction/Additional information	Buoy position monitoring
Registrant	Trinity House
Message number	6
DAC	235
FI	20
State	In force
Number of slots (max)	1
Permitted as from	1/4/2019

Details:

Parameter	Number of bits	Description
Message ID	6	Message identifier, always 6.
Repeat Indicator	2	Used by the repeater to indicate how many times a message has been repeated. 0 – 3; default = 0; 3 = do not repeat any more.
Source ID	30	The AtoN MMSI number
Sequence Number	2	0-3
Destination ID	30	Destination MMSI number
Retransmit Flag	1	Retransmit Flag should be set upon retransmission: 0 = no retransmission = default 1 = retransmitted.
Spare	1	Not used, set to ‘0’
DAC	10	UK & NI area code – set to 235
FI	6	Function identifier – set to 20
Station name	204	The AtoN name
UTC Day	5	1-31 0=not available = default
UTC Hour	5	0-23 24 = not available = default
UTC Minute	6	0-59 60 = not available = default
Longitude	28	Longitude in 1/10 000 min (180°, East = positive (as per 2’s complement), West = negative (as per 2’s complement). 181 = not available = default)
Latitude	27	Latitude in 1/10 000 min (±90°, North = positive (as per 2’s complement), South = negative (as per 2’s complement). 91° = not available = default)
Off Position Status	1	0 = on position, 1 = off position
Spare	4	Not used, set to 0
TOTAL OF BITS.	368

Note: The IALA ASM Collection is not an endorsement of any message, and is not an authority for any DAC/FI combinations

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Monitoring aids to navigation

redwire_superuser — Wed, 15 Feb 2017 16:22:46 +0000

Introduction/Additional information:

Zeni Lite Buoy Co., Ltd, uses a proprietary message format for addressed binary message 6 for monitoring aids to navigation.

Registrant:

Zeni Lite Buoy Co., Ltd

Message number: 6

DAC: 0

FI: 0

State: in force

Number of slots (max): 1

Permitted as from: 01/03/2002

Details:

Parameter	Number of bits	Description
Message ID	6	Identifier for this message 6; always 6.
Repeat Indicator	2	Used by the repeater to indicate how many times a message has been repeated. 0 – 3; default = 0; 3 = do not repeat any more.
Source ID	30	MMSI number of source station
Sequence Number	2	0 – 3
Destination ID	30	MMSI number of destination station.
Retransmit Flag	1	Retransmit Flag should be set upon retransmission: 0 = no retransmission = default 1 = retransmitted.
Spare	1	Not used. Should be zero
DAC	10	Destination Area Code. Default: 0
FI	6	Function Identifier Default: 0
Sub-application ID	16	Default: 1
Voltage Data	12	Lantern supply voltage data. Max 409.6V
Current Data	10	Lantern drain current data. Max 102.3A
Power Supply Type	1	AC or DC 0: AC 1: DC
Light Status	1	Light On or Light Off 0: Light Off 1: Light On
Battery Status	1	Good or Low voltage 0: Good 1: Low voltage
Off Position Status	1	Off position or On position 0: On position 1: Off position
Spare	6	For future use. Should be zero.
TOTAL OF BITS.	136	Occupies 1 slot.

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Text telegram using 6-bit ASCII

redwire_superuser — Wed, 15 Feb 2017 15:28:47 +0000

Introduction/Additional information:

This IFM should be used by a ship or base station to send 6-bit ASCII text telegram to other AIS stations. The text telegram can be sent with either binary message 6 or 8. The acknowledge required flag should not be set when using the broadcast message 8.Replaced by ITU-R.M.1371-3

Registrant:

ITU-R.M.1371-1

Message number:

DAC:

FI:

State:

replaced

Number of slots (max):

Permitted as from:

01/01/1998

Not to be used after:

31/05/2007

Details:

TABLE 25
International function message 0 using Message 6, addressed binary message

Parameter	Number of bits	Description
Message ID	6	Identifier for Message 6; always 6
Repeat indicator	2	Used by the repeater to indicate how many times a message has been repeated. See § 4.6.1, Annex 2; 0-3; 0 = default; 3 = do not repeat any more
Source ID	30	MMSI number of source station
Sequence number	2	0-3; see § 5.3.1, Annex 2
Destination ID	30	MMSI number of destination station
Retransmit flag	1	Retransmit flag should be set upon retransmission: 0 = no retransmission = default; 1 = retransmitted
Spare	1	Not used. Should be zero
DAC	1	International DAC = 1₁₀ = 0000000001₂
FI	0	Function identifier = 0₁₀ = 000000₂
Acknowledge required flag	1	1 = reply is required 0 = reply is not required
Message sequence number	11	Sequence number to be incremented by the application. All zeros indicates that sequence numbers are not being used
Text message	924	6-bit ASCII as defined in Table 14. When using this IFM, the number of slots used for transmission should be minimized taking into account the table below
Spare bits	N	Formula for inserting for spare bits
Total number of application data bits	936

The following table gives the number of 6-bit-ASCII characters, so that the whole message fits into a given number of slots. It is recommended that any application minimizes the use of slots by limiting the number of characters to the numbers given, if possible:

Number of slots	Maximum number of 6-bit ASCII characters
	Addressed binary message, 06	Broadcast binary message
1	8	14
2	46	51
3	83	88
4	120	126
5	158	163

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Text using 6-bit ASCII

redwire_superuser — Wed, 15 Feb 2017 15:24:52 +0000

Introduction/Additional information:

Registrant:

ITU-R.M.1371-3

Message number:

DAC:

FI:

State:

in force

Number of slots (max):

Permitted as from:

01/06/2007

Details:

TABLE 25
International function message 0 using Message 6, addressed binary message

Parameter	Number of bits	Description
Message ID	6	Identifier for Message 6; always 6
Repeat indicator	2	Used by the repeater to indicate how many times a message has been repeated. See § 4.6.1, Annex 2; 0-3; 0 = default; 3 = do not repeat any more
Source ID	30	MMSI number of source station
Sequence number	2	0-3; see § 5.3.1, Annex 2
Destination ID	30	MMSI number of destination station
Retransmit flag	1	Retransmit flag should be set upon retransmission: 0 = no retransmission = default; 1 = retransmitted
Spare	1	Not used. Should be zero
DAC	1	International DAC = 1₁₀ = 0000000001₂
FI	0	Function identifier = 0₁₀ = 000000₂
Acknowledge required flag	1	1 = reply is required, optional for addressed binary messages and not used for binary broadcast messages 0 = reply is not required, optional for an addressed binary message and required for binary broadcast messages
Text sequence number	11	Sequence number to be incremented by the application. All zeros indicates that sequence numbers are not being used
Text string	6-906	6-bit ASCII as defined in Table 47, Annex 8. When using this IFM, the number of slots used for transmission should be minimized taking into account Table 29. For Message 6 the maximum is 906.
Spare bits	Max 6	Not used for data and should be set to zero. The number of bits should be either 0, 2, 4, or 6 to maintain byte boundaries. NOTE 1 – When a 6-bit spare is needed to satisfy the 8-bit byte boundary rule, the 6-bit spare will be interpreted as a valid 6‑bit character (all zeros is the “@” character). This is the case when the number of characters is: 1, 5, 9, 13,17, 21, 25, etc.
Total number of application data bits	112-1 008	For Message 6 the maximum is 920.

TABLE 29

Estimated number of slots	Maximum number of 6-bit ASCII characters based upon typical bit stuffing
	Addressed binary Message 6	Broadcast binary Message 8	Message 25		Message 26
	Addressed binary Message 6	Broadcast binary Message 8	Addressed binary	Broadcast binary	Addressed binary	Broadcast binary
1	6	11	6	11	2	7
2	43	48	−	−	40	45
3	80	86	−	−	77	82
4	118	123	−	−	114	120
5	151	156	−	−	150	163
NOTE 1 – The 5-slot value accounts for the worst case bit stuffing condition.

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Application acknowledgement

redwire_superuser — Wed, 15 Feb 2017 15:23:31 +0000

Introduction/Additional information:

This IFM should be used by a ship or base station to acknowledge a binary message.
This IFM should be returned to the interrogating station only.

Registrant:

ITU-R.M.1371-1

Message number:

DAC:

FI:

State:

replaced

Number of slots (max):

Permitted as from:

01/01/1998

Not to be used after:

01/04/2010

Details:

Replaced by DAC 1 FI 5 (warning older AIS stations could still use this one)

Parameter	Number of bits	Description
IAI/DAC code	10	See Annex 2, Table 20
Message sequence number	11	Sequence number in the message being acknowledged
Spare bits	3	Formula for inserting for spare bits
Total number of bits	24

Annex 2, Table 20

DAC	Function identifier	Resulting application identifier (binary)	Resulting application identifier (hex)	Description
1	0	0000 0000 0100 0000	40	Use of these messages, e.g. for aids-to-navigation, VTS, search and rescue, should be as defined in Annex 5
1	1	0000 0000 0100 0001	41
1	2	0000 0000 0100 0010	42
1	3	0000 0000 0100 0011	43
1	…	0000 0000 01XX XXXX	…
1	63	0000 0000 0111 1111	007F

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Interrogation for specified FMs within the IAI branch

redwire_superuser — Wed, 15 Feb 2017 15:22:11 +0000

Introduction/Additional information:

This IFM allows a station to interrogate for a specified application within the IAI or DAC branch.
This IFM should be returned to the interrogating station only.

Registrant:

ITU-R.M.1371-1

Message number:

DAC:

FI:

State:

in force

Station link:

Verkeerspost Dordrecht

Number of slots (max):

Permitted as from:

01/01/1998

Details:

Parameter	Number of bits	Description
IAI/DAC code	10	See Annex 2, Table 20
FI code	6	See Table 20
Total number of bits	16

Annex 2, Table 20

DAC	Function identifier	Resulting application identifier (binary)	Resulting application identifier (hex)	Description
1	0	0000 0000 0100 0000	40	Use of these messages, e.g. for aids-to-navigation, VTS, search and rescue, should be as defined in Annex 5
1	1	0000 0000 0100 0001	41
1	2	0000 0000 0100 0010	42
1	3	0000 0000 0100 0011	43
1	…	0000 0000 01XX XXXX	…
1	63	0000 0000 0111 1111	007F

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Capability interrogation

redwire_superuser — Wed, 15 Feb 2017 15:19:37 +0000

Introduction/Additional information:

This IFM should be used by a ship or base station to request another station of its implemented application identifiers. The request is made for each IAI and DAC separately.

Registrant:

ITU-R.M.1371-1

Message number:

DAC:

FI:

State:

in force

Station link:

Verkeerspost Dordrecht

Number of slots (max):

Permitted as from:

01/01/1998

Details:

Parameter	Number of bits	Description
IAI/DAC code	10	See Annex 2, Table 20
Spare	6	Spare. Should be set to zero
Total number of bits	16

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Capability reply

redwire_superuser — Wed, 15 Feb 2017 15:18:06 +0000

Introduction/Additional information:

This IFM should be used by a ship or a base station to reply to a capability interrogation message.
The reply contains a table of the implemented application identifiers.

This IFM should be returned to the interrogating station only.

Registrant:

ITU-R.M.1371-1

Message number:

DAC:

FI:

State:

in force

Station link:

Verkeerspost Dordrecht

Number of slots (max):

Permitted as from:

01/01/1998

Details:

Parameter	Number of bits	Description
IAI/DAC code	10	See Annex 2, Table 20
Capability mask	128	IAI/DAC FI capability table, two consecutive bits should be used for every IAI/DAC FI as follows: first bit: IAI/DAC FI available if set to 1 IAI/DAC FI not available if set to 0 =default second bit: reserved for future use, such as version indication should be set to zero
Spare	6	Spare. Should be set to zero
Total number of bits	80

Annex 2, Table 20

DAC	Function identifier	Resulting application identifier (binary)	Resulting application identifier (hex)	Description
1	0	0000 0000 0100 0000	40	Use of these messages, e.g. for aids-to-navigation, VTS, search and rescue, should be as defined in Annex 5
1	1	0000 0000 0100 0001	41
1	2	0000 0000 0100 0010	42
1	3	0000 0000 0100 0011	43
1	…	0000 0000 01XX XXXX	…
1	63	0000 0000 0111 1111	007F

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Application acknowledgement to an addressed binary message

redwire_superuser — Wed, 15 Feb 2017 15:14:47 +0000

Details:

Replacing by DAC 1 FI 1 (warning older AIS stations could still use DAC 1 FI 1)

Parameters	Number of bits	Description
Message ID	6	Identifier for Message 6; always 6
Repeat indicator	2	Used by the repeater to indicate how many times a message has been repeated. See § 4.6.1, Annex 2; 0-3; 0 = default; 3 = do not repeat any more
Source ID	30	MMSI number of source station
Sequence number	2	0-3; see § 5.3.1, Annex 2
Destination ID	30	MMSI number of destination station
Retransmit flag	1	Retransmit flag should be set upon retransmission: 0 = no retransmission = default; 1 = retransmitted
Spare	1	Not used. Should be zero
DAC	10	International DAC = 110 = 00000000012
FI	6	Function identifier = 510 = 0001012
DAC code of received FM	10	Recommended to be spare
FI code of received FM	6
Text sequence number	11	Sequence number in the message being acknowledged as properly received 0 = default (no sequence number) 1-2 047 = sequence number of received FM
AI available	1	0 = received but AI not available 1 = AI available
AI response	3	0 = unable to respond 1 = reception acknowledged 2 = response to follow 3 = able to respond but currently inhibited 4-7 = spare for future use
Spare bits	49	Not used, should be set to zero, reserved for future use
Total number of bits	168	The resulting Message 6 occupies 1 slot

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Dangerous cargo indication

redwire_superuser — Wed, 15 Feb 2017 15:13:19 +0000

Introduction/Additional information:

This message should be used as a respond on a request for Dangerous Cargo Indication from a competent authority. The message content is essential to identify that harbour where the necessary documents for the dangerous goods cargo can be found, e. g. last and next port of call. The indication of main dangerous goods and its quantity gives at least an estimation of a potential danger. Intended Application: The data are for use of a competent authority only. Attributes of message: addressed, ship transmitting, no acknowledgement.

Registrant:

IMO Circ. 236

Message number:

DAC:

FI:

State:

deprecated

Number of slots (max):

Permitted as from:

01/05/2004

Not to be used after:

01/01/2013

Details:

Parameter	No. bits	Description
Message ID	6	Identifier for Message 6, always 6
Repeat Indicator	2	Used by the repeater to indicate how many times a message has been repeated. Refer to § 4,6,1 0 – 3; default = 0; 3 = do not repeat any more ;
Source ID	30	MMSI number of source station
Sequence Number	2	0 – 3; refer to § 5,3,1
Destination ID	30	MMSI number of destination station
Retransmit Flag	1	Retransmit Flag should be set upon retransmission: 0 = no retransmission = default; 1 = retransmitted.
Spare	1	Not used. Should be zero
IAI	16	DAC = 001; FI =12
Last Port of call	30	UN Locode 5 characters 6 bit ASCII @@@@@ = not available = default
ATD from Last Port of Call	20	Actual Time of Departure, MMDDHHMM UTC
		Bits 19 – 16: month; 1 – 12; 0 = not available = default
		Bits 15 – 11: day; 1 – 31; 0 = not available = default
		Bits 10 – 6: hour; 0 – 23; 24 = not available = default
		Bits 5 – 0: minute; 0 – 59; 60 = not available = default
Next Port of call	30	UN Locode 5 characters 6 bit ASCII @@@@@ = not available = default
ETA at Next Port of Call	20	Estimated Time of Arrival, MMDDHHMM UTC
		Bits 19 – 16: month; 1 – 12; 0 = not available = default
		Bits 15 – 11: day; 1 – 31; 0 = not available = default
		Bits 10 – 6: hour; 0 – 23; 24 = not available = default
		Bits 5 – 0: minute; 0 – 59; 60 = not available = default
Main Dangerous Good	120	Maximum 20 characters 6 bit ASCII @@@@@@@@@@@@@@@@@@@@ = not available = default
IMD category of Main Dangerous Good	24	Maximum 4 characters 6 bit ASCII @@@@@ = not available = default
UN Number of Main Dangerous Good	13	1 – 3363 UN Number 3364- 8191 should not be used 0 = not available = default
Value of Quantity of Main Dangerous Good	10	0 = not available = default; 1 – 1023 = value of quantity
Unit of Quantity of Main Dangerous Good	2	0 = not available = default 1 = in kg 2 = in tons (10E3 kg) 3 = in 1,000 tons (10 E 6 kg)
Spare	3	Not used. Should be set to zero
Total Number of bits	360	Occupies 2 slots

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